Coupling member for lubricating devices



July 12, 1921. 1,635,371

v A. LEVENSON COUPLING MEMBER FOR LUBRICATING DEVICES Filed April 1. 1925 ATTORNEY Patented d ii f 2 ns ree stares ADOLPI-I LEvE'Nsot oF NEW YORK, 1v. Y.

; wcourtnve MEMBER roe tuzenrcarme'nnvrons. i-

' Appl ication filed April 1, 1925.. Serial no. 19,955.

'A further objectof the invention is to provide means for preventing the escape of grease from the 'pipe' or coupling after the gun has been disconnected from the cup.

NVith'the above and other objects in view,

the invention further includes the following novel features and details of construction to be hereinafter more fully described, illustrated in the accompanying drawlngs and pointedout in the appended claim.

In the drawings Figure 1 is an elevation illustrating acoupling attached to a grease cup, the latter being shown by dotted lines.

Figure 2 is an end View of the coupling.

Figure 3 is an enlarged section taken substantially on the line 33 of Figure 1.-

Figure 4 is a sectiontaken on the line 1- 1 of Figure 1, a portion of the grease cup being shown. v V Figure 5 is a fragmentary View similar to Figure 3 but illustratinfg a slightly modified form of the invention. 1 i I Figure 6 is a section on the line 6'6 of Fi ure 5.

fiet'erring to the drawings in detail Wherein like characters of reference; denote corresponding parts, the coupling is shown as including a tubular member or casing 10 which has a threaded engagement at one end with a plug 11, the latter being in turn connected to the end of a flexible tube or is provided with an inwardly extending .flange 14 which is notched at diametrically pipe 12 and being provided with a passage 13, whereby grease may pass from the pipe 12 into the casing 10.

The opposite or outer end of the casing opposite points as indicated at 15. These notches permit of the passage of wings or lugs 16 which extend radially from'the head open end of the coupling so," that j'the 18 will engage behind the inner ends of'the wings, or lugs 16 and when the coupling member is rotated in either direction; the inner ends of these Wings'or lugs will enter spaced notches 19 provided in the flange 14,. i

15 llno'rde'r to effect this engagement, the coupling nember is moved axially outward a distance equal toft he depth o'fthefnotches For the disengagement of the wings 16 from the notches 19, the casing 10 is provided with a movable preferably concave-convex disk 20. This disk is formed-of metal and is provided with a similarly shaped yieldable or compressible lining or facing 21.which en ages the adjacent rounded end of the headlZ and is yieldingly forced in suchen- 'purpose ofpreventing accidental;

the notches being located at substantially' ninety degrees; with respect to the notches gagement by a spring22. This spring bears against a pin 23 which extends transversely of the casing 10. t r Theend of the passage 13 which opens into the casing lOis provided with a conical seat 24- which receives a valve member .or plug 25; the latter being yieldingly held upon said seat by a spring 26, This spring engages the plug 25 and surrounds a stem 26 carried by the plug, the pin 23' serving as an abutment for the spring so-as to hold the plug-seated. I a p Atter pressure sufficient to force grease through the pipe 12 into the cup 18 has been" reduced by reverse operationiof the grease I gun operating means, there still remains suflicient pressure to cause a vgradual outflow of grease through the end ofthe pipe 12. The spring 26 is sufilciently strong to v overcome this pressure and keep the member 25 normally seated so that the annoyance The tension from this cause is eliminated. of the spring however is not sufficient to prevent free outlet ofthecgrease under the operation of the gun and the disks 20 and 21 are provided with openings 27 through which the grease passes into the grease cup. 7 'The inner wall of the coupling 18 provided with a stop shoulder 28 which limits outward movement of the disks 20 and 21 when the coupling is detached from the cup.

In the form of the invention illustrated in Figures'o and 6, the head 17 of the grease cup is provided with spaced grooves 29 for the passage of spaced lugs 30 which extend inwardly from the flange '14 at the end of the-coupling. The grooves29 are shaped as illustrated in my application before mentioned. Y r. I y i The invention is susceptible of various changes in its form, proportions and minor- 'details of construction and the right is herein reserved to make such changes as claimed is In a lubricating device, the combination with a grease cup having spaced radially disposed lugs, of a coupling member open I atits outer end to receive said cup, a plug projecting from the other en'd of said member and havin a lon itudinal bore a transb C 7 v verse pin arranged within said member, a valve a spring interposed between the pin and valve and normally holding the latter seated to close said bore, an inwardly ex-e v shoulder formed within the member above said flange, a concave-cl metallic plate slidably movable Within said member, a packing at one side of said plate, said plate and packing'having aligned central openings, a second spring arranged at the opposite. side of said pin for normally holding therpacking against said shoulder, said plate and packing being moved inwardly against the tension of said spring by said cup, whereby the plate holds said lugs engaged in the last mentioned notches.

In testimony whereof I aflix my signature.

ADOLPH LEVENSON. 

